@article{GDZPPN00225266X,
title = {Classification der algebraischen Stahlensysteme},
journal = {Mathematische Annalen},
volume = {35},
year = {1890},
pages = {100-140},
zbl = {22.0818.01},
url = {http://dml.mathdoc.fr/item/GDZPPN00225266X}
}
Schumacher. Classification der algebraischen Stahlensysteme. Mathematische Annalen, Tome 35 (1890) pp. 100-140. http://gdmltest.u-ga.fr/item/GDZPPN00225266X/